/**************************************************************************** * drivers/lcd/ssd1351.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_LCD_SSD1351 /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* SSD1351 configuration settings: * CONFIG_SSD1351_PARALLEL8BIT - 8-bit parallel interface * CONFIG_SSD1351_SPI3WIRE - 3-wire SPI interface * CONFIG_SSD1351_SPI4WIRE - 4-wire SPI interface * CONFIG_SSD1351_SPIMODE - SPI mode * CONFIG_SSD1351_SPIFREQ - SPI frequency * CONFIG_SSD1351_NINTERFACES - number of physical devices supported * CONFIG_SSD1351_XRES - X resolution * CONFIG_SSD1351_YRES - Y resolution * CONFIG_SSD1351_MIRRORX - mirror along the X axis * CONFIG_SSD1351_MIRRORY - mirror along the Y axis * CONFIG_SSD1351_INVERT - invert the display * CONFIG_SSD1351_VDDEXT - external VDD * CONFIG_SSD1351_TRST - reset period * CONFIG_SSD1351_TPRECHG1 - first pre-charge period * CONFIG_SSD1351_PERFENHANCE - enhance display performance * CONFIG_SSD1351_CLKDIV - clock divider * CONFIG_SSD1351_OSCFREQ - oscillator frequency * CONFIG_SSD1351_TPRECHG2 - second pre-charge period * CONFIG_SSD1351_VPRECHG - pre-charge voltage level * CONFIG_SSD1351_VCOMH - COM deselect voltage level * CONFIG_SSD1351_CONTRASTA - color A contrast * CONFIG_SSD1351_CONTRASTB - color B contrast * CONFIG_SSD1351_CONTRASTC - color C contrast * CONFIG_SSD1351_MSTRCONTRAST - master contrast ratio * * Required LCD driver settings: * CONFIG_LCD_SSD1351 - enables SSD1351 support * CONFIG_LCD_MAXPOWER - maximum power, must be 1 * * Additional LCD driver settings: * CONFIG_LCD_LANDSCAPE - landscape * CONFIG_LCD_RLANDSCAPE - reverse landscape * CONFIG_LCD_PORTRAIT - portrait * CONFIG_LCD_RPORTRAIT - reverse portrait * * Required SPI driver settings: * CONFIG_SPI - enables support for SPI * CONFIG_SPI_CMDDATA - enables support for cmd/data selection * (if using 4-wire SPI) */ /* Max power */ #if CONFIG_LCD_MAXPOWER != 1 # error "CONFIG_LCD_MAXPOWER should be 1" #endif /* 9-bit SPI */ #ifdef CONFIG_SSD1351_SPI3WIRE # define SSD1351_SPICMD 0 # define SSD1351_SPIDATA (1 << 8) # define SSD1351_SPIBITS 9 #else # define SSD1351_SPIBITS 8 #endif /* Macro Helpers ************************************************************/ #define SSD1351_CLAMP(n, a, b) MIN(MAX(n, a), b) /* Fundamental Commands *****************************************************/ /* Set column address. Two data bytes. * Data 1: start address (0-127) * Data 2: end address (0-127) */ #define SSD1351_CMD_COLADDR 0x15 /* Set row address. Two data bytes. * Data 1: start address (0-127) * Data 2: end address (0-127) */ #define SSD1351_CMD_ROWADDR 0x75 /* Write data bytes to RAM. */ #define SSD1351_CMD_RAMWRITE 0x5c /* Read data bytes from RAM. */ #define SSD1351_CMD_RAMREAD 0x5d /* Set address increment, column address mapping, color sequence, * scan direction, COM split, and color depth. * One data byte. */ #define SSD1351_CMD_ORIENTATION 0xa0 #define SSD1351_ADDRINCHORIZ 0x00 /* Horizontal address increment */ #define SSD1351_ADDRINCVERT 0x01 /* Vertical address increment */ #define SSD1351_REMAPCOL0 0x00 /* Column address 0 mapped to SEG0 */ #define SSD1351_REMAPCOL127 0x02 /* Column address 127 mapped to SEG0 */ #define SSD1351_COLORABC 0x00 /* Color sequence ABC */ #define SSD1351_COLORCBA 0x04 /* Color sequence CBA */ #define SSD1351_SCANFROMCOM0 0x00 /* Scan from COM0 */ #define SSD1351_SCANTOCOM0 0x10 /* Scan to COM0 */ #define SSD1351_SPLITDIS 0x00 /* Disable COM split odd even */ #define SSD1351_SPLITEN 0x20 /* Enable COM split odd even */ #define SSD1351_DEPTH65K 0x00 /* 65k color depth */ #define SSD1351_DEPTH262K1 0x80 /* 262k color depth format 1 */ #define SSD1351_DEPTH262K2 0xc0 /* 262k color depth format 2 */ /* Set vertical scroll by RAM (0-128). One data byte. */ #define SSD1351_CMD_STARTLINE 0xa1 #define SSD1351_STARTLINE(n) SSD1351_CLAMP(n, 0, 128) /* Set vertical scroll by row (0-128). One data byte. */ #define SSD1351_CMD_OFFSET 0xa2 #define SSD1351_OFFSET(n) SSD1351_CLAMP(n, 0, 128) /* Set all pixels off. No data bytes. */ #define SSD1351_CMD_ALLOFF 0xa4 /* Set all pixels on. No data bytes. */ #define SSD1351_CMD_ALLON 0xa5 /* Set normal display. No data bytes. */ #define SSD1351_CMD_NORMAL 0xa6 /* Set inverse display. No data bytes. */ #define SSD1351_CMD_INVERSE 0xa7 /* Set VDD and interface. One data byte. */ #define SSD1351_CMD_VDDIFACE 0xab #define SSD1351_VDDEXT 0x00 /* external VDD */ #define SSD1351_VDDINT 0x01 /* internal VDD */ #define SSD1351_IFACE8BIT 0x00 /* 8-bit parallel */ #define SSD1351_IFACE16BIT 0x40 /* 16-bit parallel */ #define SSD1351_IFACE18BIT 0xc0 /* 18-bit parallel */ /* Set display off (sleep mode on). No data bytes. */ #define SSD1351_CMD_DISPOFF 0xae /* Set display on (sleep mode off). No data bytes. */ #define SSD1351_CMD_DISPON 0xaf /* Set reset period in DCLKs (5-31) and first pre-charge period * in DCLKs (3-15). One data byte. */ #define SSD1351_CMD_TRSTTPRECHG1 0xb1 #define SSD1351_TRST(n) (SSD1351_CLAMP(n, 5, 31) / 2) #define SSD1351_TPRECHG1(n) (SSD1351_CLAMP(n, 3, 15) << 4) /* Set display performance. Three data bytes. */ #define SSD1351_CMD_PERF 0xb2 #define SSD1351_PERFNORMAL 0x00 /* Data 1: normal performance */ #define SSD1351_PERFENHANCED 0xa4 /* Data 1: enhanced performance */ #define SSD1351_PERFDATA2 0x00 #define SSD1351_PERFDATA3 0x00 /* Set clock divider (0-10) and oscillator frequency (0-15). * One data byte. */ #define SSD1351_CMD_DIVFREQ 0xb3 #define SSD1351_CLKDIV(r) (SSD1351_CLAMP(r, 0, 10) << 0) #define SSD1351_OSCFREQ(r) (SSD1351_CLAMP(r, 0, 15) << 4) /* Set segment low voltage. Three data bytes. */ #define SSD1351_CMD_VSL 0xb4 #define SSD1351_VSLEXT 0xa0 /* Data 1: external VSL */ #define SSD1351_VSLDATA2 0xb5 #define SSD1351_VSLDATA3 0x55 /* Set GPIO pins. One data byte. */ #define SSD1351_CMD_GPIO 0xb5 #define SSD1351_GPIODIS 0x00 /* High impedance, disabled */ #define SSD1351_GPIOEN 0x01 /* High impedance, enabled */ #define SSD1351_GPIOLOW 0x02 /* Output low */ #define SSD1351_GPIOHIGH 0x03 /* Output high */ #define SSD1351_GPIO0(n) (((n) & 3) << 0) #define SSD1351_GPIO1(n) (((n) & 3) << 2) /* Set second pre-charge period in DCLKs (1-15). One data byte. */ #define SSD1351_CMD_TPRECHG2 0xb6 #define SSD1351_TPRECHG2(n) SSD1351_CLAMP(n, 1, 15) /* Set lookup table for grayscale pulse width. 63 data bytes. */ #define SSD1351_CMD_LUT 0xb8 /* Use built-in linear lookup table. No data bytes. */ #define SSD1351_CMD_LINEARLUT 0xb9 /* Set pre-charge voltage level as a percentage of VCC (20-60). * One data byte. */ #define SSD1351_CMD_VPRECHG 0xbb #define SSD1351_VPRECHG(n) (100 * (SSD1351_CLAMP(n, 20, 60) - 20) / \ (100 * (60 - 20) / 31)) /* Set COM deselect voltage level as a percentage of VCC (72-86). * One data byte. */ #define SSD1351_CMD_VCOMH 0xbe #define SSD1351_VCOMH(n) ((SSD1351_CLAMP(n, 72, 86) - 72) / 2) /* Set contrast for colors A (0-255), B (0-255), and C (0-255). * Three data bytes. * Data 1: color A * Data 2: color B * Data 3: color C */ #define SSD1351_CMD_CONTRAST 0xc1 #define SSD1351_CONTRAST(n) SSD1351_CLAMP(n, 0, 255) /* Set master contrast ratio in sixteenths (1-16). One data byte. */ #define SSD1351_CMD_MSTRCONTRAST 0xc7 #define SSD1351_MSTRCONTRAST(n) (SSD1351_CLAMP(n, 1, 16) - 1) /* Set multiplex ratio (16-128). One data byte. */ #define SSD1351_CMD_MUXRATIO 0xca #define SSD1351_MUXRATIO(n) (SSD1351_CLAMP(n, 16, 128) - 1) /* Set command lock. One data byte. */ #define SSD1351_CMD_LOCK 0xfd #define SSD1351_UNLOCK 0x12 /* Unlock commands */ #define SSD1351_LOCK 0x16 /* Lock commands */ #define SSD1351_INACCESSIBLE 0xb0 /* Make some commands inaccessible */ #define SSD1351_ACCESSIBLE 0xb1 /* Make some commands accessible */ /* Graphic Acceleration Commands ********************************************/ /* Set horizontal scroll. Five data bytes. * Data 1: 0x00: no scrolling * 0x01-0x3f: scroll towards SEG127 with 1 column offset * 0x40-0xff: scroll towards SEG0 with 1 column offset * Data 2: start row address * Data 3: number of rows to scroll */ #define SSD1351_CMD_HSCROLL 0x96 #define SSD1351_HSCROLLDATA4 0x00 /* Data 4 */ #define SSD1351_HSCROLLTEST 0x00 /* Data 5: test mode */ #define SSD1351_HSCROLLNORMAL 0x01 /* Data 5: normal */ #define SSD1351_HSCROLLSLOW 0x02 /* Data 5: slow */ #define SSD1351_HSCROLLSLOWEST 0x03 /* Data 5: slowest */ /* Start horizontal scroll. No data bytes. */ #define SSD1351_CMD_STARTHSCROLL 0x9e /* Stop horizontal scroll. No data bytes. */ #define SSD1351_CMD_STOPHSCROLL 0x9f /* Color Properties *********************************************************/ /* Display resolution */ #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) #define SSD1351_XRES CONFIG_SSD1351_XRES #define SSD1351_YRES CONFIG_SSD1351_YRES #else #define SSD1351_XRES CONFIG_SSD1351_YRES #define SSD1351_YRES CONFIG_SSD1351_XRES #endif /* Color depth and format */ #define SSD1351_BPP 16 #define SSD1351_COLORFMT FB_FMT_RGB16_565 #define SSD1351_STRIDE (2 * SSD1351_XRES) #define SSD1351_PIX2BYTES(p) (2 * (p)) /**************************************************************************** * Private Types ****************************************************************************/ /* This structure describes the state of this driver */ struct ssd1351_dev_s { /* Publicly visible device structure */ struct lcd_dev_s dev; /* Private LCD-specific information follows */ #ifdef CONFIG_SSD1351_PARALLEL8BIT FAR struct ssd1351_lcd_s *lcd; /* Contained platform-specific interface */ #elif defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) FAR struct spi_dev_s *spi; /* Contained SPI driver instance */ #endif uint8_t power; /* Current power (backlight) setting */ /* This is working memory allocated by the LCD driver for each LCD device * and for each color plane. This memory will hold one raster line of * data. The size of the allocated run buffer must therefore be at least * (bpp * xres / 8). Actual alignment of the buffer must conform to the * bitwidth of the underlying pixel type. * * If there are multiple planes, they may share the same working buffer * because different planes will not be operate on concurrently. However, * if there are multiple LCD devices, they must each have unique run * buffers. */ uint16_t runbuffer[SSD1351_XRES]; /* This is another buffer, but used internally by the LCD driver in order * to expand the pixel data into 9-bit data needed by the LCD. There are * some customizations that would eliminate the need for this extra buffer * and for the extra expansion/copy, but those customizations would require * a special, non-standard SPI driver that could expand 8- to 9-bit data on * the fly. */ #ifdef CONFIG_SSD1351_SPI3WIRE uint16_t rowbuffer[SSD1351_STRIDE + 1]; #endif }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Helpers */ #ifdef CONFIG_SSD1351_PARALLEL8BIT #define ssd1351_select(priv) #define ssd1351_deselect(priv) #elif defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) static void ssd1351_select(FAR struct ssd1351_dev_s *priv); static void ssd1351_deselect(FAR struct ssd1351_dev_s *priv); #endif #if defined(CONFIG_SSD1351_PARALLEL8BIT) && !defined(CONFIG_LCD_NOGETRUN) static void ssd1351_read(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR uint8_t *data, size_t datlen); #endif static void ssd1351_write(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR const uint8_t *data, size_t datlen); /* LCD Data Transfer Methods */ static int ssd1351_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels); static int ssd1351_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels); /* LCD Configuration */ static int ssd1351_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo); static int ssd1351_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo); /* LCD RGB Mapping */ #ifdef CONFIG_FB_CMAP # error "RGB color mapping not supported by this driver" #endif /* Cursor Controls */ #ifdef CONFIG_FB_HWCURSOR # error "Cursor control not supported by this driver" #endif /* LCD Specific Controls */ static int ssd1351_getpower(struct lcd_dev_s *dev); static int ssd1351_setpower(struct lcd_dev_s *dev, int power); static int ssd1351_getcontrast(struct lcd_dev_s *dev); static int ssd1351_setcontrast(struct lcd_dev_s *dev, unsigned int contrast); /* Initialization */ static inline void ssd1351_hwinitialize(FAR struct ssd1351_dev_s *priv); /**************************************************************************** * Private Data ****************************************************************************/ /* This is the standard, NuttX LCD driver object */ static struct ssd1351_dev_s g_lcddev; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: ssd1351_select * * Description: * Select the SPI, locking and re-configuring if necessary. * ****************************************************************************/ #if defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) static void ssd1351_select(FAR struct ssd1351_dev_s *priv) { FAR struct spi_dev_s *spi = priv->spi; /* Select the chip, locking the SPI bus in case there are multiple devices * competing for the SPI bus */ ginfo("SELECTED\n"); SPI_LOCK(spi, true); SPI_SELECT(spi, SPIDEV_DISPLAY(0), true); /* Now make sure that the SPI bus is configured for this device (it might * have gotten configured for a different device while unlocked) */ SPI_SETMODE(spi, CONFIG_SSD1351_SPIMODE); SPI_SETBITS(spi, SSD1351_SPIBITS); SPI_HWFEATURES(spi, 0); SPI_SETFREQUENCY(spi, CONFIG_SSD1351_SPIFREQ); } #endif /**************************************************************************** * Name: ssd1351_deselect * * Description: * De-select the SPI. * ****************************************************************************/ #if defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) static void ssd1351_deselect(FAR struct ssd1351_dev_s *priv) { FAR struct spi_dev_s *spi = priv->spi; /* De-select the chip and relinquish the SPI bus */ ginfo("DE-SELECTED\n"); SPI_SELECT(spi, SPIDEV_DISPLAY(0), false); SPI_LOCK(spi, false); } #endif /**************************************************************************** * Name: ssd1351_read * * Description: * Send a 1-byte command and read datlen data bytes. * ****************************************************************************/ #if defined(CONFIG_SSD1351_PARALLEL8BIT) && !defined(CONFIG_LCD_NOGETRUN) static void ssd1351_read(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR uint8_t *data, size_t datlen) { FAR struct ssd1351_lcd_s *lcd = priv->lcd; size_t i; /* Sanity check */ DEBUGASSERT(priv != NULL); DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0)); /* Send the command */ lcd->cmd(lcd, cmd); /* Discard the first data read if reading from the display */ if (cmd == SSD1351_CMD_RAMREAD) { lcd->read(lcd); } /* Read all of the data */ for (i = 0; i < datlen; i++) { data[i] = lcd->read(lcd); } } #endif /**************************************************************************** * Name: ssd1351_write * * Description: * Send a 1-byte command followed by datlen data bytes. * ****************************************************************************/ #ifdef CONFIG_SSD1351_PARALLEL8BIT static void ssd1351_write(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR const uint8_t *data, size_t datlen) { FAR struct ssd1351_lcd_s *lcd = priv->lcd; size_t i; /* Sanity check */ DEBUGASSERT(priv != NULL); DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0)); /* Send the command */ lcd->cmd(lcd, cmd); /* Write all of the data */ for (i = 0; i < datlen; i++) { lcd->write(lcd, data[i]); } } #elif defined(CONFIG_SSD1351_SPI3WIRE) static void ssd1351_write(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR const uint8_t *data, size_t datlen) { size_t i; /* Sanity check */ DEBUGASSERT(priv != NULL); DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0)); DEBUGASSERT(datlen <= SSD1351_STRIDE); /* Copy the command into the line buffer */ priv->rowbuffer[0] = (uint16_t)cmd | SSD1351_SPICMD; /* Copy any data after the command into the line buffer */ for (i = 0; i < datlen; i++) { priv->rowbuffer[i + 1] = (uint16_t)data[i] | SSD1351_SPIDATA; } /* Send the line buffer */ SPI_SNDBLOCK(priv->spi, priv->rowbuffer, datlen + 1); } #elif defined(CONFIG_SSD1351_SPI4WIRE) static void ssd1351_write(FAR struct ssd1351_dev_s *priv, uint8_t cmd, FAR const uint8_t *data, size_t datlen) { FAR struct spi_dev_s *spi = priv->spi; /* Sanity check */ DEBUGASSERT(priv != NULL); DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0)); /* Select command transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true); /* Send the command */ SPI_SEND(spi, cmd); /* Do we have any data to send? */ if (datlen > 0) { /* Yes, select data transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), false); /* Transfer all of the data */ SPI_SNDBLOCK(spi, data, datlen); } } #endif /**************************************************************************** * Name: ssd1351_setcursor * * Description: * Set the cursor position. * ****************************************************************************/ static void ssd1351_setcursor(FAR struct ssd1351_dev_s *priv, uint8_t col, uint8_t row) { uint8_t buf[2]; #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) /* Set the column address to the column */ buf[0] = col; buf[1] = SSD1351_XRES - 1; ssd1351_write(priv, SSD1351_CMD_COLADDR, buf, 2); /* Set the row address to the row */ buf[0] = row; buf[1] = SSD1351_YRES - 1; ssd1351_write(priv, SSD1351_CMD_ROWADDR, buf, 2); #elif defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT) /* Set the column address to the row */ buf[0] = row; buf[1] = SSD1351_YRES - 1; ssd1351_write(priv, SSD1351_CMD_COLADDR, buf, 2); /* Set the row address to the column */ buf[0] = col; buf[1] = SSD1351_XRES - 1; ssd1351_write(priv, SSD1351_CMD_ROWADDR, buf, 2); #endif } /**************************************************************************** * Name: ssd1351_putrun * * Description: * This method can be used to write a partial raster line to the LCD: * * Input Parameters: * dev - The lcd device * row - Starting row to write to (range: 0 <= row < yres) * col - Starting column to write to (range: 0 <= col <= xres-npixels * buffer - The buffer containing the run to be written to the LCD * npixels - The number of pixels to write to the LCD * (range: 0 < npixels <= xres-col) * ****************************************************************************/ static int ssd1351_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels) { FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev; /* Sanity check */ DEBUGASSERT(buffer != NULL && ((uintptr_t)buffer & 1) == 0 && col >= 0 && col + npixels <= SSD1351_XRES && row >= 0 && row < SSD1351_YRES); /* Select and lock the device */ ssd1351_select(priv); /* Set the starting position for the run */ ssd1351_setcursor(priv, col, row); /* Write all of the data */ ssd1351_write(priv, SSD1351_CMD_RAMWRITE, buffer, SSD1351_PIX2BYTES(npixels)); /* Unlock and de-select the device */ ssd1351_deselect(priv); return OK; } /**************************************************************************** * Name: ssd1351_getrun * * Description: * This method can be used to read a partial raster line from the LCD. * * Input Parameters: * dev - The lcd device * row - Starting row to read from (range: 0 <= row < yres) * col - Starting column to read from (range: 0 <= col <= xres-npixels) * buffer - The buffer in which to return the run read from the LCD * npixels - The number of pixels to read from the LCD * (range: 0 < npixels <= xres-col) * ****************************************************************************/ static int ssd1351_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels) { #if defined(CONFIG_SSD1351_PARALLEL8BIT) && !defined(CONFIG_LCD_NOGETRUN) FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev; /* Sanity check */ DEBUGASSERT(buffer != NULL && ((uintptr_t)buffer & 1) == 0 && col >= 0 && col + npixels <= SSD1351_XRES && row >= 0 && row < SSD1351_YRES); /* Select and lock the device */ ssd1351_select(priv); /* Set the starting position for the run */ ssd1351_setcursor(priv, col, row); /* Read all of the data */ ssd1351_read(priv, SSD1351_CMD_RAMREAD, buffer, SSD1351_PIX2BYTES(npixels)); /* Unlock and de-select the device */ ssd1351_deselect(priv); return OK; #else return -ENOSYS; #endif } /**************************************************************************** * Name: ssd1351_getvideoinfo * * Description: * Get information about the LCD video controller configuration. * ****************************************************************************/ static int ssd1351_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo) { DEBUGASSERT(dev != NULL && vinfo != NULL); vinfo->fmt = SSD1351_COLORFMT; vinfo->xres = SSD1351_XRES; vinfo->yres = SSD1351_YRES; vinfo->nplanes = 1; ginfo("fmt: %u xres: %u yres: %u nplanes: %u\n", vinfo->fmt, vinfo->xres, vinfo->yres, vinfo->nplanes); return OK; } /**************************************************************************** * Name: ssd1351_getplaneinfo * * Description: * Get information about the configuration of each LCD color plane. * ****************************************************************************/ static int ssd1351_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo) { FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev; DEBUGASSERT(dev != NULL && pinfo != NULL && planeno == 0); pinfo->putrun = ssd1351_putrun; pinfo->getrun = ssd1351_getrun; pinfo->buffer = (FAR uint8_t *)priv->runbuffer; pinfo->bpp = SSD1351_BPP; pinfo->dev = dev; ginfo("planeno: %u bpp: %u\n", planeno, pinfo->bpp); return OK; } /**************************************************************************** * Name: ssd1351_getpower * * Description: * Get the LCD panel power status * (0: full off - CONFIG_LCD_MAXPOWER: full on). * On backlit LCDs, this setting may correspond to the backlight setting. * ****************************************************************************/ static int ssd1351_getpower(FAR struct lcd_dev_s *dev) { FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev; /* Sanity check */ DEBUGASSERT(priv != NULL); ginfo("power: %d\n", priv->power); return priv->power; } /**************************************************************************** * Name: ssd1351_setpower * * Description: * Enable/disable LCD panel power * (0: full off - CONFIG_LCD_MAXPOWER: full on). * On backlit LCDs, this setting may correspond to the backlight setting. * ****************************************************************************/ static int ssd1351_setpower(FAR struct lcd_dev_s *dev, int power) { FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev; /* Sanity check */ DEBUGASSERT(priv != NULL && (unsigned int)power <= LCD_FULL_ON); ginfo("power: %d\n", power); /* Select and lock the device */ ssd1351_select(priv); if (power > LCD_FULL_OFF) { /* Turn the display on */ ssd1351_write(priv, SSD1351_CMD_DISPON, NULL, 0); priv->power = LCD_FULL_ON; } else { /* Turn the display off */ ssd1351_write(priv, SSD1351_CMD_DISPOFF, NULL, 0); priv->power = LCD_FULL_OFF; } /* Unlock and de-select the device */ ssd1351_deselect(priv); return OK; } /**************************************************************************** * Name: ssd1351_getcontrast * * Description: * Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int ssd1351_getcontrast(FAR struct lcd_dev_s *dev) { return -ENOSYS; } /**************************************************************************** * Name: ssd1351_setcontrast * * Description: * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int ssd1351_setcontrast(FAR struct lcd_dev_s *dev, unsigned int contrast) { return -ENOSYS; } /**************************************************************************** * Name: ssd1351_hwinitialize * * Description: * Initialize the video hardware. * ****************************************************************************/ static inline void ssd1351_hwinitialize(FAR struct ssd1351_dev_s *priv) { size_t i; uint8_t buf[3]; /* Select and lock the device */ ssd1351_select(priv); /* Unlock most commands */ buf[0] = SSD1351_UNLOCK; ssd1351_write(priv, SSD1351_CMD_LOCK, buf, 1); /* Unlock the rest of the commands */ buf[0] = SSD1351_ACCESSIBLE; ssd1351_write(priv, SSD1351_CMD_LOCK, buf, 1); /* Turn the display off */ ssd1351_write(priv, SSD1351_CMD_DISPOFF, NULL, 0); /* Set the address increment, the column address mapping, the color * sequence, the scan direction, the COM split, and the color depth */ buf[0] = SSD1351_COLORABC | SSD1351_SPLITEN | SSD1351_DEPTH65K; #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) buf[0] |= SSD1351_ADDRINCHORIZ; #else buf[0] |= SSD1351_ADDRINCVERT; #endif #if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORX)) || \ (defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORX)) || \ (defined(CONFIG_LCD_PORTRAIT) && !defined(CONFIG_SSD1351_MIRRORY)) || \ (defined(CONFIG_LCD_RPORTRAIT) && defined(CONFIG_SSD1351_MIRRORY)) buf[0] |= SSD1351_REMAPCOL0; #else buf[0] |= SSD1351_REMAPCOL127; #endif #if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORY)) || \ (defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORY)) || \ (defined(CONFIG_LCD_PORTRAIT) && defined(CONFIG_SSD1351_MIRRORX)) || \ (defined(CONFIG_LCD_RPORTRAIT) && !defined(CONFIG_SSD1351_MIRRORX)) buf[0] |= SSD1351_SCANTOCOM0; #else buf[0] |= SSD1351_SCANFROMCOM0; #endif ssd1351_write(priv, SSD1351_CMD_ORIENTATION, buf, 1); /* Set the vertical scroll by RAM */ #if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORY)) || \ (defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORY)) || \ (defined(CONFIG_LCD_PORTRAIT) && defined(CONFIG_SSD1351_MIRRORX)) || \ (defined(CONFIG_LCD_RPORTRAIT) && !defined(CONFIG_SSD1351_MIRRORX)) buf[0] = SSD1351_STARTLINE(CONFIG_SSD1351_YRES); #else buf[0] = SSD1351_STARTLINE(0); #endif ssd1351_write(priv, SSD1351_CMD_STARTLINE, buf, 1); /* Set the vertical scroll by row */ buf[0] = SSD1351_OFFSET(0); ssd1351_write(priv, SSD1351_CMD_OFFSET, buf, 1); /* Set the display to normal or inverse */ #ifdef CONFIG_SSD1351_INVERT ssd1351_write(priv, SSD1351_CMD_INVERSE, NULL, 0); #else ssd1351_write(priv, SSD1351_CMD_NORMAL, NULL, 0); #endif /* Set the VDD and the interface */ #ifdef CONFIG_SSD1351_VDDEXT buf[0] = SSD1351_VDDEXT; #else buf[0] = SSD1351_VDDINT; #endif buf[0] |= SSD1351_IFACE8BIT; ssd1351_write(priv, SSD1351_CMD_VDDIFACE, buf, 1); /* Set the reset period and the first pre-charge period */ buf[0] = SSD1351_TRST(CONFIG_SSD1351_TRST) | SSD1351_TPRECHG1(CONFIG_SSD1351_TPRECHG1); ssd1351_write(priv, SSD1351_CMD_TRSTTPRECHG1, buf, 1); /* Set the display performance */ #ifdef CONFIG_SSD1351_PERFENHANCE buf[0] = SSD1351_PERFENHANCE; #else buf[0] = SSD1351_PERFNORMAL; #endif buf[1] = SSD1351_PERFDATA2; buf[2] = SSD1351_PERFDATA3; ssd1351_write(priv, SSD1351_CMD_PERF, buf, 3); /* Set the clock divider and the oscillator frequency */ buf[0] = SSD1351_CLKDIV(CONFIG_SSD1351_CLKDIV) | SSD1351_OSCFREQ(CONFIG_SSD1351_OSCFREQ); ssd1351_write(priv, SSD1351_CMD_DIVFREQ, buf, 1); /* Set the segment low voltage */ buf[0] = SSD1351_VSLEXT; buf[1] = SSD1351_VSLDATA2; buf[2] = SSD1351_VSLDATA3; ssd1351_write(priv, SSD1351_CMD_VSL, buf, 3); /* Set the GPIO pins */ buf[0] = SSD1351_GPIO0(SSD1351_GPIOLOW) | SSD1351_GPIO1(SSD1351_GPIOLOW); ssd1351_write(priv, SSD1351_CMD_GPIO, buf, 1); /* Set the second pre-charge period */ buf[0] = SSD1351_TPRECHG2(CONFIG_SSD1351_TPRECHG2); ssd1351_write(priv, SSD1351_CMD_TPRECHG2, buf, 1); /* Use the built-in linear lookup table */ ssd1351_write(priv, SSD1351_CMD_LINEARLUT, NULL, 0); /* Set the pre-charge voltage level */ buf[0] = SSD1351_VPRECHG(CONFIG_SSD1351_VPRECHG); ssd1351_write(priv, SSD1351_CMD_VPRECHG, buf, 1); /* Set the COM deselect voltage level */ buf[0] = SSD1351_VCOMH(CONFIG_SSD1351_VCOMH); ssd1351_write(priv, SSD1351_CMD_VCOMH, buf, 1); /* Set the contrast */ buf[0] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTA); buf[1] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTB); buf[2] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTC); ssd1351_write(priv, SSD1351_CMD_CONTRAST, buf, 3); /* Set the master contrast ratio */ buf[0] = SSD1351_MSTRCONTRAST(CONFIG_SSD1351_MSTRCONTRAST); ssd1351_write(priv, SSD1351_CMD_MSTRCONTRAST, buf, 1); /* Set the multiplex ratio */ buf[0] = SSD1351_MUXRATIO(128); ssd1351_write(priv, SSD1351_CMD_MUXRATIO, buf, 1); /* Lock some of the commands */ buf[0] = SSD1351_INACCESSIBLE; ssd1351_write(priv, SSD1351_CMD_LOCK, buf, 1); /* Set the cursor position */ ssd1351_setcursor(priv, 0, 0); /* Clear the display memory */ buf[0] = 0; buf[1] = 0; for (i = 0; i < SSD1351_XRES * SSD1351_YRES; i++) { ssd1351_write(priv, SSD1351_CMD_RAMWRITE, buf, 2); } /* Unlock and de-select the device */ ssd1351_deselect(priv); } /**************************************************************************** * Name: ssd1351_initialize * * Description: * Initialize the video hardware. The initial state of the device * is fully initialized, display memory cleared, and ready to use, * but with the power setting at 0 (full off == sleep mode). * * Input Parameters: * lcd - A reference to the platform-specific interface. * spi - A reference to the SPI driver instance. * devno - A value in the range of 0 through CONFIG_SSD1351_NINTERFACES-1. * This allows support for multiple devices. * * Returned Value: * On success, this function returns a reference to the LCD object for the * specified device. NULL is returned on failure. * ****************************************************************************/ #ifdef CONFIG_SSD1351_PARALLEL8BIT FAR struct lcd_dev_s *ssd1351_initialize(FAR struct ssd1351_lcd_s *lcd, unsigned int devno) #elif defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) FAR struct lcd_dev_s *ssd1351_initialize(FAR struct spi_dev_s *spi, unsigned int devno) #endif { FAR struct ssd1351_dev_s *priv = &g_lcddev; /* Sanity check */ #ifdef CONFIG_SSD1351_PARALLEL8BIT DEBUGASSERT(lcd != NULL); #elif defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) DEBUGASSERT(spi != NULL); #endif DEBUGASSERT(devno == 0); /* Initialize the driver data structure */ priv->dev.getvideoinfo = ssd1351_getvideoinfo; priv->dev.getplaneinfo = ssd1351_getplaneinfo; priv->dev.getpower = ssd1351_getpower; priv->dev.setpower = ssd1351_setpower; priv->dev.getcontrast = ssd1351_getcontrast; priv->dev.setcontrast = ssd1351_setcontrast; #ifdef CONFIG_SSD1351_PARALLEL8BIT priv->lcd = lcd; #elif defined(CONFIG_SSD1351_SPI3WIRE) || defined(CONFIG_SSD1351_SPI4WIRE) priv->spi = spi; #endif priv->power = LCD_FULL_OFF; /* Configure the device */ ssd1351_hwinitialize(priv); return &priv->dev; } #endif /* CONFIG_LCD_SSD1351 */